Excavator



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G. W. KING.v

V EXGAVATOR. No. 589,565. Patented Sept. 7,1897.

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G. W. KING.

. BXGAVATOB.. No. 589,565; Patented Sept. 7, 1897.

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4 Sheets-Sheet 4. G. W. KING.

EXGAVATOR.

(No Model.)

Patented Sept. '7, 1897.

UNITED STATES PATENT Fries.

GEORGE lV. KING, OF MARION, OlllO.

EXCAVATO R.

SPECIFICATION forming part of Letters Patent No. 589,565, dated September 7', 1897'.

Application led March 17, 1896. Serial No. 583,518. (No model.)

other novel and meritorious features of con- 'o @ZZ whom zz'; may concer/t:

Be it known that l, GEORGE lV. KING, of struction and combinations of parts herein- Marion, Marion. county, Ohio, have invented after described,and pointed outin the claims. 55 certain new and useful Improvements in Ex- In the accompanying drawings, Figure'l is 5 cavators; and I do hereby declare the followa side elevation of a steam shovel or excavaing to be a full, clear, and exact description tor embodying my invention, and Fig. 2 is a of the invention, such as will enable others top plan of portions of the same. Fig. 3 is a skilled in the art to which it pertains to make top plan showing the lower portion of the on and use the saine. boom swung laterally in the one direction and ic Myinvention relates toimprovementsin exshowing also the two shovel-feed chains or cavators; and it consists, among other things, cables and the peculiar arrangement of the in animproved construction ofthe teeth-bearsheaves employed in guiding said chains or ing portion of the excavating dipper or shovel cables over the table. Fig. y-l is a side eleva- 65 so as to prevent displacement of the teeth durtion of a portion of the shovel-arm and the 15 ing the latters operation and to prevent, furmeans employed for retaining the rack upon thermore, shearing of the bolts or rivets emsaid arm in mesh with the engaging pinion of ployed in securing the teeth in place. the shovel-feed apparatus during the shovels My invention consists also in an improved operation; and Fig. 5 is a section on line 5 5, 7o connection of the bail of the shovel with the Fig. 4. Fig. 6 is a side elevation, partly in :o shovels body portionwhereby a large wearsection, of the excavating dipper or shovel ing-surface is obtained and shearing of the and load-bearing end of the shovel-arm; and rivets or devices employed in securing the Fig. 7 is a top plan of the same, partly in secbailengaged trunnions tothe shovel proper tion. In Fig. 7 the shovel-bail is removed. 75 shall be avoided, and said trunnions when Fig. 8 is a bottom plan of the connection of z 5 worn out can be easily replaced. the shovel proper with the shovel-arm. Fig.

My invention consists also in such an im- 9 is a front side elevation of the forward or proved connection between the shovel proper teeth-bearing side of the shovel, partly in secand its arm or handle as to accommodate an tion. Fig. l0 is an enlarged top plan in sec- Se adjustment of the shovelproper at different tion on line l0 10, Fig. (3. Fig. l1 is an en- 3o angles or positions relative to the shovel-arm larged plan in section on line 1l ll, Fig. G. and retain said parts firmly clamped or se- Fig. 12 isa vertical section on lines l2 12, cured to each otherin the desired adjustment. Figs. lO and ll.

My invention consists, furthermore, in a Referring to the drawings, A designates the S5 novel and meritorious arrangement of the car or body portion of a steam shovel or ex- 35 shovel-feed apparatus whereby a slow and cavatoi-embodying my invention. Car A is powerful movement is communicated to the suitably supported from two-wheeled trucks shovel during the latter-s outward or excavatd d, arranged at the forward end and rear end, ing stroke and a more rapid and less powerrespectively, of the car. Car A at its for- 9o ful motion is transmitted to the shovel upon ward end supports the horizontally-arranged 4o the latters return or inward stroke after exturn-table B, and C designates the laterallycavatin g. swinging boom, that extends upwardly and My invention consists, furthermore, in the outwardly from and is operatively connected passage of the two shovel-feed chains or cawith the turn-table. The tables axis forms 95 bles side by` side over and at opposite sides, the lower pivotal center of the boom, and the 45 respectively, of the axis of the boom-swinglatters upper pivotal center is formed upon ing turn-table and in the provision of two the upper end of the so-called A-frame or horizontal guide-sheaves for each of said camast D, that is suitably supported from the bles and so arranged as to avoid material inmachines car or body portion and at its roo terference with the tension of the cables durlower end straddles the rear portion of the 5o ing the lateral and rearward swin gin g moveturn-table. Mast or frame D is suitably supment of the boom or crane. ported from the rear bydiagonally-arranged My invent ion consists, moreover, in certain rod D', (see Fig. l,) that is suitably connect-ed boom is in the main composed.

at its upper end with the upper end of the frame or mast and thence extends rearwardly and downwardly and is suitably secured at its opposite end to the car. A metallic cap or head d embraces the upper end of the frame or mast D and terminates at its upper end in a centrally and vertically perforated vertical lug d', that is embraced by the sleeve or collar E, adapted to turn or swing upon said lug and suitably connected by means of a rod c with the upper and outer end of the boom. The axis of lug d. is coincident with the axis of the turn-table, and said axes constitute, as already indicated, the pivotal centers of the boom.

It is obvious that the boom is swung laterally in the one direction or the other, according as the tu rn-table is rotated or turned in the one or the other direction. F F designate the two turn-table-swinging chains or cables that are attached to the table at opposite sides, respectively, of the boom and thence lead rearwardly to and operatively engage different winding-drums F' FQ respectively, that are loosely mounted upon a shaftf, (see Fig. 2,) arranged transversely of and suitably supported from the car or body portion of the machine a suitable distance rearward of the turn-table. Shaft f is rotated, when operated, continuously in one direction and is intergeared at f with a shaft f2, that is arranged parallel with and a suitable distance rearward of shaft f and is suitably supported from the machines body portion. A suitablyoperated clutch F2 is provided for each winding-drum F for controlling operative connection between the drum and the d ru 1X1-supporting shaft, and it is obvious that the turn-table is turned in the one direction or the other, according as operative connection is established between the one or the other of said drums F and their supporting-shaft.

G (see Fig. l) designates the shovel proper, G the shovel-bail, and g the handle or arm of the shovel. The hoisting chain or cable G2 is suitably attached at one end to the shovelbail, and thence leads upwardly to and over a vertically-arran ged sheave G, suitably supported from and between the outer ends of the two parallel bars or beams of which the Sheave G3 has its axis extending' transversely of the boom. From sheave G3 the hoisting chain or cable leads rearwardly and approximately horizontally along and a suitable distance v above rod e to and overavertically-arranged sheave G, suitably supported from an upright bracket or member E', rigid with sleeve or collar E. Sheave G1 has its axis preferably parallel with the axis of the boom-sheave G3 and is located just forwardly of the upper pivotal center or axis of the boom, and from said sheave G4 the hoisting chain or cable leadsdownwardly through hole d2 in lug CZ' and through the upper end ofthe frame or mast D and in line with the booms axes t0 and overa vertically-arranged sheave G5, that is also arranged longitudinally of the machine and is suitably supported from any stationary member of the machine, and preferablyfrom the mast or frame D. From sheave G5 the hoisting-cable leads downwardly and rearwardly to and operatively engages a winding drum G, called the hoistingdrum, and loosely mounted'upon a shaft f", (see Fig. 2,) arranged parallel with and a suitable distance rearward of the shaft f2, and suitably supported from the machines body portion, and said shaft f4 is adapted to rotate continuously in one direction and is suitably intergeared at f5 with the suitablyactuated and suitably-supported drivingshaft f6. A suitably-operated clutch G7 controls operative connection between the hoisting-drum and the latters supporting-shaft, and it is obvious that the excavating clipper or shovel is hoisted upon establishing operative connection between said drum and shaft and lowers by gravity upon releasing said drum and permitting it to pay out the engaging cable. The arrangement of sheaves G4 G5 and the engaging sections of the hoistingcable hereinbefore described is important, because by said arrangement perfect alinement of said sheave G4 and the cable-section leading to and from said sheave is maintained and the cableis tension is not interfered with during the swinging of the boom.

The shovel-arm is preferably made solid and composed of -a single beam or timber snugly interposed between-the flanged sides of two channel-bars, as shown more clearly in Fig. 5, and is provided upon its back or underside with a rack g', rigidly secured to and arranged longitudinally of said side of the shovel-arm. Rack g' meshes with a pinion 71.', that is operatively mounted upon a shaft h, suitably supported from and arranged transversely of the bars or beams composing the boom, and it is obvious that thc shovel is thrust or fed outwardly as required to` excavate or moved or fed inwardly after its excavating-stroke, according as said shaft t is rotated in the one or the other direction.

To retain the shovel-arm rack in mesh with the engaging pinion during the feed of the shovel and atrthe same time accommodate the employment of a solid shovel-arm and necessitate the use of one pinion and one rack only and at the same time afford a lubricantreceiving or oiling chamber for said gearing, I provide-a box or case that incloses said gearing and is loosely mounted upon the pinionbearing shaft. Said case is composed, preferably, of two sections, an outer section l and an inner section I, to which the outer section is removably secured by bolts l2 (see Fig. 4) and that is provided with two internal flanges 13 13,l (see Fig. 5,) formed at opposite sides, respectively, of the rack and easily engaging parallel grooves or recesses g2 g2, respectively, with which the shovel-arm is provided at opposite sides, respectively, of the rack. Said recesses or grooves extend lon gilOO lIO

tudinally of and parallel with the rack and are formed, preferably, between the. shovelarm and flanges g3 g, formed upon opposite sides, respectively, and extendinglcngitudinally of the rack.

The two shovel feed chains or cables H and J employed in feeding the shovel in opposite directions, respectively, are suitably connected at one end with winding-dm ms H'and J ,respectively, (see Fig. 2,) that are operatively mounted upon shaft h at opposite sides, respectively, of the boom. Cable H passes in under drum- H and leads rearwardly and downwardly from said drum to and in under a vertically-arrangcd sheave H2, also arranged longitudinally of the boom and supported from the latters lower end. The cable J passes over drum J and leads rearwardly and downwardly from said drum to and in under a vertically-amanged sheave J2, that is also arranged longitudinally of the boom and su pported from the latters lower end. Sheaves ll2 and J2 are arranged, furthermore, at opposite sides, respectively, and a suitable distance forward of the booins axial line. From sheaves H2 and J 2 cables H and J lead rearwardly between and to and over the two horizontally-arranged sheaves H8 and J 3, respectively, that are supported from the turn-table at opposite sides, respectively, and a suitable distance forward of the tables axis,and thence cables H and J lead rearwardly to and are engaged by the two sheaves Hl and J 1, respectively, that are supported from the turn-table and arranged horizontally between the cables and at opposite sides, respectively, and just rearward ofthe tables axis, and thence cables H and J lead rearwardly to and over different winding-drums H5 and J respectively, that are loosely .mounted upon the intermediate shaft f2 that, as already indicated, is rotated continuously in one direction and is int-ergearcd at f3 with the hoisting-drum bearingshaft. A suitably-operated clutch K is provided for each of said drums H J 5 for est-ablishing operative connection between the drum and the latters supporting-shaft, and cable H is actuated in the direction required to effect the excavating-stroke of the shovel, or cable J is actuated in the direction required to return or inwardly feed the shovel after excavating, according as operative connection is established between said shaft and drum Il5 or drum lt will be observed that cable J is paid out by the engaging drum J while cable H is being wound upon drum H5, and vice versa; that cable J is paid out by drum J when it is wound upon drum J5, and vice versa; that cable H is paid out by drum H while it is wound upon drum H5, and vice versa; that the portions of drums lls and J5, upon which cables H and J are wound, respectively, have the saine or ap'- proximately the same diameter; that cables H and J are therefore driven at the saine speed, or approximately so, by said drums Il5 and J5, and that by the transmission of motion to the shovel in effectin g the shovels excavating-stroke, through the medium of the drum H', that is diainetrically larger, as already indicated, than the drum J through whose medi um motion is communicated to the shovel in effecting the latters return stroke after excavating, is accommodated a slow and powerful movement of the shovel in excavating and a rapid return movement of the shovelafter excavating. It will also be observed that by the construction and arrangement of windingdrums hereinbefore described the hoisting-drum is mounted upon one shaft; that the shovel feed-drums are mounted upon another shaft, and that the boom-swinging drums are mounted upon a third shaft, by which arrangement of parts the boom-Swingin g drums or the shovel-feed drums or the hoisting-drum can be speeded as desired independently of the speeding of the remaining drums.

L (see Figs. l and 2) designates a tension cha-in or cable, whose opposite ends engage,

respectively, the inner end of drum H5 and the inner diametideally-enlarged portion J of drum J 5. Cable L leads from one of said drums downwardly andrearwardly to and over a sheave L,suitably supported from the one end of a bolt or rod 3l, that extends through a bracket A', rigid with the car-body, and is provided with a spiral spring N, coniined upon said rod or bolt between the bracket and a nut unmounted upon the screwheaded shank of the bolt rearwardly of the bracket and instrumental in adjusting the tension of the spring. The spring N acts to retain the tension-cable taut, and said cable is adapted to take up any slack in either one of the shovel-feed cables when said feed-ca ble is paid out by its engaging tension-cableengaging drum. lt is obvious that because drum H is larger diametrieally than drum J drum J 5 is rotated slower than drum H5 during the feeding of the shovel, and that the diametrical enlargement of the tension-cableengaging end of drum J 5 and the correspond ence in diameter of said enlargement with drum H are therefore necessary in order to maintain the tension-cable in a taut or operative condition.

Referring, lastly, to the construction of the excavating dipper or shovel, l would remark that the shovel proper is provided, preferably, upon its forward side with any suitable number of forwardly-projecting teeth O, adapted to cut into the place of excavation and thereby facilitate the excavating operation, and said teeth are suitably secured to the forward side of the shovel proper by means of bolts or rivets O'. To prevent lateral displacement of the teeth and shearing of the teeth-securing devices by the lateral strain upon the teeth during the excavating operation, l form lateral bearings for said teeth at the forward extremities of the forward side of the shovel proper, as shown very clearly in Figs. and 9, by fitting the teeth IOO over the shovcls forward side into notches or recesses O2, formed in the forward or upper edge of said side of the shovel proper--that is, each shovel-tooth is provided with a shoulder O3, engaging the inner end wall of the respective tooth-receiving notch or recess in the shovel, and the opposing side wallsy of said recess are engaged by opposite sides, respectively, of the tooth and thereby afford an efficient lateral bearing for the tooth sufficient to avoid or prevent shearing of the rivets or securing devices during the excavating operation.

I will also remark that opposite ends of the shovel-bailk are connected with opposite sides, respectively, of the shovel, .and each end of the bail is journaled in any approved manner upon the centrally and circumferentially reduced portion of a comparatively7 large cylindrical trunnion-forming block P, (see Figs. 6, 7,`and 9,) that at its inner end engages a recess P', formed in the adjacent side of the shovel. Each block or trunnion P is rigidly secured to the shovel by several rivets I, extending longitudinally through the trunnion and through the respective shovel side. The construction of the shoveltrunnions of separate pieces removably seated within recesses formed in and riveted to the shovel proper not only effectually prevents the trunnions from shearing off the securingrivets by thelateral strain to which said trunnions are subjected during the sliovels operation, but also facilitates the replacement of said trunnions when they are worn out.

To render the shovel proper capable of being vertically tilted or adjusted at different angles or positions relative to the shovel-arm and firmly and positively secured in the desired adjustment, I provide two plates lV IV, (see Figs. 6, 7, and 8,) one whereof engages and is secured to the forward or upper side of the shovel-arm and the other whereof engages and is secured to the lower or back side of the arm. Both of said plates extend beyond the load-bearing end of the shovel-arm and engage the shovel proper. At least one and preferably both of said plates, as shown, afford bearing for a slide formed upon the shovel proper, and one of said platesthe one attached to the under or back side of the arm-is adjustable longitudinally of the arm. In the case illustrated a segmental fiange W is rigidly formed upon each of said plates, and the convex side of said iiange faces the shovel proper and affords bearing for the outer or concave side of a slide or member 72, rigidly formed upon the shovel proper, and bolts 73, arranged at suitable intervals widthwise of the shovel, extend through said mutually-engaging members and have their heads engaging the inner side of the concave member, and nuts V4 are mounted upon the bolts at the outer orconeave side of the flange. Said nuts and bolts are instrumental in rml y clamping the respective mutuallyengaging members, and consequently the shovel proper and shovel-arm together, and a washer-forming plate W5 (see also Figs. 10, 1l, and 12) Is shown interposed between the nuts and segmental flange, and said plate or washer upon its inner side has the convexity required to fit the concavity in the flange, and the boltholes in the anges are elongated in the direction required to accommodate the vertical tilting or adjustment of the shovel proper at different angles or positions relative to the shovel-arm.

Anysuitable number of bolts U rigidly secure the forward or upper plate XV to the shovel-arm, and both plates IV are preferably ribbed longitudinally, as at fw.

Any suitable number of bolts U are instrumental iu securing both plates IV to the shovel-arm, and two series of bolts U' are preferably provided at opposite sides, respectivelyQof ribs w. Bolts U have their heads engaging the outer side of -the vupper plate and have their Shanks extending through the shovel-arm and through holes yw in the lower plate, (see Fig. 6,) and nuts U2, mounted upon said bolt-shank at the outer side of said lower plate, are instrumental in securing saidplate in the desired adjustment. The lower plate is provided with other bolt-holes to2, arranged in line and kequidistant from the different bolt-holes yw', respectively, so as to accommodate the securing of said plate by the same bolts and nuts U' and U2, respectively, in its different longitudinal adjustments. It is obvious that upon removing nuts U2, partially withdrawing bolts U', and loosening nuts )V4 the lower plate IV is rendered free to be adjusted longitudinally of the shovel-arm, and the shovel proper is rendered free to be tilted vertically or adjusted at a different angle to the shovel-arm, and the parts are secured, in the desired adjustment by reapplying said bolts and retightenin g said nuts.

The bearing X, (see Fig. 6,) formed upon and longitudinally of the load-bearing end of the shovel-arm for the longitudinal adjust` able or lower plate W, has such trend that an adequate bearing between said adjustable plate and shovel-arm is obtained in any adj ustment of the shovel proper.

Excavating-shovels of the character indicated are of course provided with a hinged bottom whose construction and operation need not be described or shown in this application, because it forms no part of the subject-matter of the application.

That I claim isl. The combination with the excavatingshovels forward side having notches or recesses formed at its upper edge at suitable intervals, of teeth bolted or riveted to said side and occupying the aforesaid notches or recesses, substantially as and for the purpose S`et forth.

2. In an excavatorLthe excavating-shovel having each of its bail-bearing sides provided exteriorly with a cylindrical recess and IOO ZIO

having cylindrical bail-engaging trunni ons snugly litted into said recesses, and several rivets extending longitudinally through said trunnions and through the truunion-bearing sides of the bucket.

The combination of the shovel-arm; a plate arranged at the forward or upper side, and secured to the load-bearing end, of said arm; another plate arranged at the back or under side, and secured to said end, of the arm the shovel proper attached to said plates and adjustable at different angles to the arm in a vertical plane, andv means for securing the shovel in the desired adjustment, substantially as and for the purpose set forth.

et. The combination with the shovel proper and shovel-amm of a plate arranged at the forward or upper side of and secured to thc arm, another plate arranged at the lower or back side of and secured to the arm, an arcshaped slidcway formed upon one of said plates and arranged up and down and facing the shovel proper, a slide engaging said slideway and rigid with the shovel proper, means for securing the slide in the desired adjustment upon the slideway, and the other plate being adjustable longitudinally of the arm, substantially as and for the purpose set forth.

5. The combination with the shovel proper and shovel-arm, of a plate arranged at the forward or upper side of and secured to the arm, another plate arranged at the lower or back side of and secured to the arm, arcshaped slideuf'ays formed upon the forward ends of said plates, and arranged up and down and facing the shovel proper, slides engaging said slideways and rigid with the shovel proper, means for secu rin g the slides in the desired adjustment., and one of said plates being adjustable longitudinally of the arm, substantially as and for the purpose set forth.

G. The combination of the shovel proper and shovel-arm 5 a plate arranged at the forward o1' upper side, and secured to the loadbearing end, of the arm; another plate arranged at the lower or back side, and secured to said end, of the arm; an arc-shaped slideway formed upon one of said plates and arranged up and down and facing the shovel proper; a slide formed upon the shovel proper and engaging said slideway; means for sec u ring the slide in the desired adjustment upon the slideway; the other plate being adjustable longitudinally of the arm and having a suitable connection with the shovel proper, and the arms side engaged by said last-mentioned plate having such trend that an adequate bearing for said plate is obtained in the different adjustments of the shovel proper, substantially as and for the purpose set forth.

7. The combination with the shovel proper and shovel-arm, a plate arranged at the forward or upper side of and suitably secured to the arm, another plate arranged at the lower or back side of and suitably secured to the arm, one of said plates being adjustable longitudinally of the arm, of a mutuallyengaging segmental flange and correspondingly-concave memberinstrument-al in connecting together each of the aforesaid plates and shovel properand having' a common axis extending widthwise of the shovel proper, one of said mutually-engaging members being formed upon the respective plate and the other being formed upon the shovel proper, and means for clamping said mutuall f-engaging members together, substantially as and for the purpose set forth.

S. The combination with the shovel proper and shovel-arm, a plate arranged at the forward or upper side of and suitabljv secured to the arm, another plate arranged at the back or under side of and suitably secured to the arm; one of said plates being adjustable longitudinally of the arm, of a m utually-engaging segmental flange and correspondinglyconcave member instrumental in connecting together each of the aforesaid plates and shovel proper and having a com mon axis extending Widthwise of the shovel proper, one of said mutually-engaging members being formed upon the respective plate and the other being formed upon the shovel proper, bolts and nuts instru mental in rigidly clamping together said mutually-engaging niembers, said bolts extendin g through said mutually-engaging members, and the bolt-holes in the member formed upon the respective plate being elongated in the direction required to accommodate the adjustment of the shovel proper concentrically of the aforesaid axis, substantially as and for the purpose set forth.

9. The combination of the shovel-arm, a plate arranged at the forward or upper side of and secured to the arm,another plate arranged at the back or under side of and secured to the arm, the shovel proper attached to said plates and adjustable at different angles to the arm in a vertical plane, nuts and bolts arranged at intervals longitudinally of the arm for securing one of said plates to the arm7 and said last-mentioned plate having bolt-holes engaged by said bolts and having other boltholes arranged in line with and equidistant from the different occupied bolt-holes, respectively, substantially as and for the purpose set forth.

l0. rl`he combination of the shovel-arm, a Vplate arranged at the forward or upper side of the arm, another plate arranged at the back or under side of the arm, the shovel proper attached to said plates and adjustable at different angles to the arm in a vertical plane, nuts and bolts arranged at intervals longitudinally of the arm and instrumental in securing both of said plates to the shovelarm, and one of the aforesaid plates having other holes arranged in line with the holes engaged by said bolts, substantially as and for the purpose set forth.

1l. The combination of the shovel-arm, a plate at the forward or upper side of the arm, another plate at the lower or back side of the IOO IOS

ITO

arm, the shovel proper attached to said plates and adjustable at different angles to the arm in a vertical plane, nuts and bolts arran ged at intervals longitudinally of the arm and instrumental in securing both of said plates to the arm, one of the aforesaid plates having other bolt-holes arranged in line with the holes engaged by said bolts, and other bolts or devices independently securing the other plate to the shovel-arm, substantially as set forth.

12. The combination with the boom, a suitably-actuated shaft supported from the boom, a pinion operatively mounted upon said shaft, the excavating-shovel having an arm provided with a rack arranged longitudinally of the arm and meshing with the aforesaid pinion, and provided furthermore with two grooves or recesses arranged at opposite sides, respectively, of the rack, of the oil reservoir or shell embracing the pinion and journaled upon the aforesaid shaft, and provided with flanges engaging the aforesaid recesses, substantially as set forth.

13. The combination with the boom, a pinion suitably supported from the boom, the excavating-shovel having an arm provided with a rack meshing with said pinion, two drums operatively connected with the pinion, and two suitably-actuated cables engaging the different drums, respectively, substantially as and for the purpose set forth.

14. The combination with the boom, a shaft suitably supported from the boom, the excavating-shovel operatively connected with said shaft, two drums operatively connected with said shaft and one of said drums beingdiametrieally larger than the other, a suitably-actuated cable operatively engaging the larger drum, another suitably-actuated cable operatively engaging the smaller drum, and the arrangement of parts being' such that the larger drum is instrumental in effecting the excavating stroke of the shovel, and I[he smaller drum is employed in effecting the return stroke of the shovel after excavating, substantially as and for the purpose set forth.

15. The combination of the machines body portion a shaft suitably supported from said body portion and rotating, when operated, continuously in the one direction; two winding-drums loose upon said shaft; a clutch for each drum for controlling operative connection between the drum and shaft; the boom; the excavating-shovel; a shaft on the boom; means establishing operative connection between the boom-shaft and shovel, so that the shovel is fed in the one direction or the other, according as the boom-shaft is rotated in the one or the other direction; two drums operatively mounted upon the boom-shaft, and two cables operatively connecting the different boom-shaft drums, respectively, with the different clutch-controlled drums, respectively, substantially as'and for the purpose set forth.

1G. The combination of the machines body portion; a shaft suitably supported from said body portion and suitably rotated, when opcrated, continuously 'in one direction; two winding-drums mounted loosely upon said shaft; a clutch foreach drum for controlling` operative connection between said drum and the shaft; the boom; a pinion suit-ably supported from the boom; the excavating-shovel having an arm provided with a rack meshing with said pinion,the two pinion-d riving drums operatively connected with said pinion and differing in size diainetrically, two cables operatively connecting the different piniondriving drums, respectively, with the different clutch controlled drums, respectively, and the arrangement of parts being such that the larger pin ion-driving drum shall be instrumental in effecting the excavating stroke of the shovel, and the other pinion-driving drum shall find employment in effecting the return stroke of the shovel after excavating, substantially as and for the purpose set forth.

17. The combination of the excavatingshovel and two suitably-supported drums operatively connected with and adapted to feed the shovel in opposite directions,respecti vely. a suitably-supported shaft suitably rotated in the one direction, two drums loose upon said shaft, a clutch for each of said loose ymounted drums for controlling operative connection between the drum and shaft, two cables operatively connecting the different firstmentioned drums, respectively, with the different clutch-controlled drums, respectively. and a tension-cable connected, at opposite ends, with the different clutchcontrolled drums, respectively, substantially as and for the purpose set forth.

18. The combination with a suitably-supported shaft rotating, when operated, continuously in one direction, two drums. loose upon said shaft, a clutch for each drum for controlling operative connection between the drum and shaft, the excavating-shovel, two cables engaging different drums, respectively. and such operative connection between said cables and the shovel as will adapt the drum s to propel or actuate the shovel in opposite directions, respectively, and will cause one or' said drums to pay out the engaging cable more rapidly than the other drum during the feeding operation of the shovel, of an enlarged end or drum formed upon one of said drums, and a tension-cable connected, at one end, with the diametrically-enlarged drinn end or drum and connected, at its opposite end, with the other winding-drum, substantially as and for the purpose set forth.

19. The combination with two suitably-supported drums instrumental in feeding the shovel in opposite directions, respectively, a suitably-supported shaft suitably rotated in one direction, two drums loose upon said shaft and one of said drums having a diametrically-larger end, a clutch for each of said loosely-mounted drums for controlling operative connection between the drum and shaft, a cable operatively connecting the smaller shovel-feed drum with the clutchlIO controlled drinn that has the d iametricallylarger end, another cable operatively connect-ing the larger shovel-feed drum with the other clutch-controlled druin, of a tensioncable connected, at one end with the diainetrically-'larger end of the clutch-controlled drum having,l said end, land connected at its opposite end with the other clutch-controlled drinn,*substantially as and for the purpose set forth.

20. The combination of the inachines body portion; a shaft support-ed from said body portion and suitably driven, when operated, continuously in one direction, two druins mounted loosely upon said shaft and having` equal or approximately equal diameters except that one of said drums has a diametri@- ally-enlarged end a clutch for each drum for controlling; operative connection between said drum and the shaft; the boom; a pinion supported from the boom; the excavatingshovcl having` an arm provided with a rack meshing' with said pinion; two drums operatively connected with said pinion and adapted to drive the pinion in opposite directions, respectively, and said pinion-driving` drums differing in size dianietrieally; two cables operatively connecting the diiterent piniondriving` drums, respectively,with the different clutch-controlled drums, respectively, and a.

suitablyguided tension-cable connected at one end with the diainetrically-enlarged portion of the one clutch-controlled druin and suitably connected at its other end with the other clutch-controlled drum, all arranged and operating, substantially as shown, for the purpose specified.

2l. rl`he combination of the turn-table, the booin operatively connected with said table, a pinion supported from the boom, the exeavating-shovel having au arm provided with a rack arranged longitudinally of the arm and meshing with said pinion, two drums operatively connected with the pinion, two vertically-arranged sheaves arranged at opposite sides, respectively, of and supported at or near the booins lower end, a pairof horizontal sheaves arranged between the verticallyarranged sheaves and tables axes a distance apart equal or approximately equal to the distance between the vertically arranged sheaves, another pair oi' horizontal sheaves arranged just rearward of and at opposite sides, respectively, of the tables axes, and the two suitably-driven shovel-feed chains or cables operatively connected with the dilerent drums, respectively, and guided over the turn-table by the aforesaid sheaves, substantially as shown, for the purpose specified.

22. The combination with the suitably-actuated and suitably-supported horizontallyarranged turn-table, the boom operatively connected with said table, a pinion suitably supported from the booin, the excavatingshovel having an arin provided with a rack arranged longitudinally of the arni and meshing with the aforesaid pinion, two drums differ-ing,` in size diametrically and operatively connected with said pinion and located at opposite sides, respectively, of the booin, two vertically-arranged sheaves arranged at opposite sides, respectively, of and suitably supported at or near the booins lower end, a pair of suitably supported horizontal sheaves arranged between the vertically arranged sheaves and tables axis a distance apart equal, or approximatelyequal, to the distance between the vertically-arranged sheaves, and another pair of horizontal sheaves arranged just rearward of and at opposite sides, respectively, of the tables axis, and the two suitably-actuated shovel-feed chains or cables operatively connected with the different drums, respectively, and suitably' guided over the turn-table by the aforesaid sheaves, in a `manner substantially as shown, for the purpose set forth.

23. A machine of the character indicated, having the hoisting-drum loosely mounted upon one shaft, the two shovel-feed drums loosely mounted upon another shaft suitably driven continuously in one direction, and the two boom-swinging' 4druins loosely mounted upon a third shaft rotating continuously in one direction, and a clutch for each of said drums for controlling operative connection between the drinn and the sha-ft supporting it, substantially as and for the purpose set forth.

In testimony whereof I sign this specification, in the presence of two witnesses, this th day of February, 1390.

GEORGE W. KING. lVitnesses:

FRANK A. HUBER, S. C. BowEN.

ICO 

